Check SSD health using built-in operating system tools or third-party software that reads SMART data

Your solid-state drive reports its own health status through a system called SMART (Self-Monitoring, Analysis and Reporting Technology). Windows, macOS, and Linux all have ways to read this data for free. Third-party programs like CrystalDiskInfo, Hard Disk Sentinel, and Crucial Storage Executive offer more detailed breakdowns and can alert you when problems appear.

The reason to check is practical: SSDs don't fail gradually the way older hard drives did. They tend to work normally until they suddenly don't, often with little warning. Checking SMART data every few months gives you time to back up your files before that happens, rather than losing everything when the drive stops responding.

Key Takeaways

  • Windows users can check SSD health through Settings > System > Storage > Disk Management, or use the command prompt tool wmic logicaldisk get name to see basic status.
  • macOS users can open Disk Utility, select the drive, and click Info to see health status and available space.
  • Third-party tools like CrystalDiskInfo (Windows/Mac) read more detailed SMART attributes and send notifications when values drop.
  • SMART data shows wear level, temperature, and error counts — high numbers in any category mean the drive is aging faster than normal.
  • Regular backups matter more than frequent health checks, because SSDs can fail suddenly even when SMART data looks normal.

How to check SSD health in Windows

Open Settings, go to System, then Storage. Look for your SSD in the list and click it. Windows will show you the drive's capacity and how much space is in use, but not detailed health information. For actual SMART data, you need the command prompt.

Open Command Prompt as administrator (right-click and select "Run as administrator"). Type wmic logicaldisk get name and press Enter to see your drives listed. Then type wmic logicaldisk where name="C:" get status, replacing C: with your SSD's letter if different. A status of "OK" means no immediate problems detected. A status of "Degraded" or "Pred Fail" means the drive is failing and you should back up immediately.

For more detail than Windows provides, download CrystalDiskInfo (free version available). Install it, open it, and it will show your drive's SMART attributes in a color-coded list. Green means healthy, yellow means caution, and red means the drive is failing. The program can also run in the background and notify you when values change.

How to check SSD health on macOS

Open Disk Utility (search for it in Spotlight or find it in Applications > Utilities). Select your SSD from the list on the left. Click the Info button at the top. macOS will show you the drive's capacity, used space, and a Health Status field. "Verified" means the drive is working normally. "About to Fail" means you need to back up and replace it soon.

Disk Utility does not show detailed SMART attributes the way Windows tools do. If you want more information, download CrystalDiskInfo for Mac or Hard Disk Sentinel. Both read the same SMART data and display it in a more granular way, showing individual metrics like wear level and temperature history.

Understanding SMART data and what the numbers mean

SMART attributes fall into a few categories that matter for SSDs. Wear Level (sometimes called "Media Wearout Indicator") shows how much of the drive's lifespan has been used. Most SSDs are rated for 100 to 600 terabytes written before wear becomes a concern, depending on the model. A wear level of 0 to 50 percent is normal; 50 to 80 percent means the drive is aging but still has time; above 80 percent means replacement is approaching.

Temperature appears in SMART data on most drives. SSDs normally run between 30 and 50 degrees Celsius during regular use. Sustained temperatures above 70 degrees Celsius can shorten lifespan. If your drive runs hot, check that your case has adequate airflow and that the drive is not blocked by cables or other components.

Reallocated Sector Count and Uncorrectable Error Rate are less common on SSDs than on older hard drives, but when they appear, high numbers mean the drive is developing bad storage cells. Any value above zero is worth monitoring. If these numbers climb quickly, the drive is failing.

Power-On Hours and Power Cycle Count are informational rather than warning signs. They tell you how long the drive has been running and how many times it has been powered on. These numbers alone do not indicate a problem.

When to replace your SSD based on SMART data

Replace your drive immediately if SMART status shows "Failing", "Critical", or "Pred Fail" (predicted failure). Do not wait. Back up everything you need and order a replacement today. Drives in this state can stop working without warning.

Replace your drive within the next few weeks if wear level is above 90 percent, if temperature consistently exceeds 70 degrees Celsius, or if error counts are climbing. You have time to plan the replacement and transfer your data, but do not delay.

Monitor your drive more closely if wear level is between 70 and 90 percent or if you see occasional errors that are not increasing. Check SMART data monthly instead of quarterly. These drives are not in immediate danger, but they are aging faster than normal.

No action is needed if wear level is below 70 percent, temperature is normal, and error counts are zero or stable. Continue your regular backup schedule and check SMART data every few months.

Tools that work across Windows and Mac

CrystalDiskInfo runs on both Windows and macOS. The free version shows all SMART attributes, displays them in an easy-to-read format with color coding, and can alert you by email or notification when values change. The paid version adds scheduled scanning and more detailed reports, but the free version is sufficient for most users.

Hard Disk Sentinel also works on both platforms. It shows SMART data, temperature graphs over time, and can predict failure based on trend analysis. It costs money, but the trial version is fully functional for 30 days.

Crucial Storage Executive is free if you own a Crucial SSD, but will not work with drives from other manufacturers. If you have a Crucial drive, it is worth downloading because it shows wear level and temperature in a simple dashboard.

For Linux users, the command-line tool smartctl (part of the smartmontools package) reads SMART data directly. Install it with your package manager, then run sudo smartctl -a /dev/sda (replacing sda with your drive's identifier) to see full SMART output.

Why SMART data is not a complete picture

SMART data is useful, but it is not perfect. Some SSDs fail suddenly even when SMART status shows "OK". This happens because SMART monitors certain types of wear and error, but not all failure modes. A drive can have a controller failure or firmware crash that SMART does not predict.

This is why regular backups matter more than frequent health checks. Check SMART data every few months to catch aging drives before they fail, but do not rely on it as your only warning system. Keep a current backup of your important files on a separate drive or cloud storage at all times.

Frequently Asked Questions

How often should I check my SSD's SMART data?

Check every three to six months during normal use. If your drive is more than five years old, or if you see any warning signs, check monthly. You do not need to check more often than that — SMART data changes slowly, and daily checks will not give you useful information.

What does "Media Wearout Indicator" mean?

It is a percentage showing how much of your SSD's rated lifespan has been used. Most consumer SSDs are rated to handle 100 to 600 terabytes of data written before wear becomes a concern. If your drive shows 50 percent wear, it has used half its rated lifespan but still has years of normal use ahead.

Can I trust SMART data to tell me when my drive will fail?

SMART data is a useful indicator but not a may provide. It catches many failing drives before they stop working, but some SSDs fail suddenly without warning signs in SMART data. Use SMART monitoring as one part of your strategy, but always keep backups of important files on a separate device.

Is it normal for my SSD to run hot?

SSDs normally run between 30 and 50 degrees Celsius. Temperatures above 70 degrees Celsius during regular use suggest poor airflow or a drive that is working harder than it should. Check that your case fans are working, cables are not blocking the drive, and the drive has a heatsink if it came with one.

What should I do if SMART says my drive is failing?

Back up your files immediately to an external drive or cloud storage. Do not wait. Then order a replacement SSD and plan to transfer your operating system and programs to the new drive. A failing SSD can stop working without warning, so treat this as urgent even if the drive still seems to work normally.